该系统于今年3月在“Baby Come Home”网站上推出，其中包含了全国各地数千张失踪儿童的照片。
The system was launched on "Baby Come Home" in March and contains thousands of pictures of missing children across the country.
例如，没人确切地知道一个人究竟能记住多少张不同的面孔，但是各类评估倾向于几千张上下——依据一个人可能相识的人数来判断。
No one really knows how many different faces someone can recall, for example, but various estimates tend to hover in the thousands—based on the number of acquaintances a person might have.
一张图片胜过千言万语，它能帮助你发挥想象力。
A picture is worth a thousand words and helps you use your imagination.
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